:root{--bg: #ffffff;--bg-alt: #f7f8fa;--surface: #ffffff;--surface-2: #f3f4f6;--surface-3: #e9ebef;--text: #1f2937;--text-2: #6b7280;--text-3: #9099a5;--border: #d1d5db;--border-soft: #e5e7eb;--accent: #3730a3;--accent-hover: #312e81;--accent-soft: #eef2ff;--accent-line: #c7d2fe;--ist: #b45309;--ist-soft: #fffbeb;--ok: #15803d;--ok-soft: #f0fdf4;--warn: #b45309;--warn-soft: #fffbeb;--err: #b91c1c;--radius: 8px;--radius-sm: 6px;--wrap: 1160px;--font: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;--mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--shadow: 0 1px 2px rgba(16, 24, 40, .05)}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg: #0f1115;--bg-alt: #14171d;--surface: #171a21;--surface-2: #1d212a;--surface-3: #262b36;--text: #e8eaed;--text-2: #a0a7b4;--text-3: #78808e;--border: #313743;--border-soft: #262b36;--accent: #a5b4fc;--accent-hover: #c7d2fe;--accent-soft: #1e1b4b;--accent-line: #3730a3;--ist: #fbbf24;--ist-soft: #2a2109;--ok: #4ade80;--ok-soft: #0d2117;--warn: #fbbf24;--warn-soft: #2a2109;--err: #f87171;--shadow: 0 1px 2px rgba(0, 0, 0, .4)}}:root[data-theme=dark]{--bg: #0f1115;--bg-alt: #14171d;--surface: #171a21;--surface-2: #1d212a;--surface-3: #262b36;--text: #e8eaed;--text-2: #a0a7b4;--text-3: #78808e;--border: #313743;--border-soft: #262b36;--accent: #a5b4fc;--accent-hover: #c7d2fe;--accent-soft: #1e1b4b;--accent-line: #3730a3;--ist: #fbbf24;--ist-soft: #2a2109;--ok: #4ade80;--ok-soft: #0d2117;--warn: #fbbf24;--warn-soft: #2a2109;--err: #f87171}*{box-sizing:border-box}[hidden]{display:none!important}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg-alt);color:var(--text);font-family:var(--font);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}img{max-width:100%}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hover);text-decoration:underline}:focus-visible{outline:2px solid var(--accent);outline-offset:1px;border-radius:2px}.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:16px}h1,h2,h3,h4{margin:0 0 .5rem;line-height:1.25;font-weight:700;letter-spacing:-.012em}h1{font-size:1.6rem}h2{font-size:1.18rem;margin-top:1.9rem;padding-bottom:.4rem;border-bottom:1px solid var(--border-soft)}h3{font-size:1rem;margin-top:1.2rem}p{margin:0 0 .8rem}.lede{color:var(--text-2);margin-bottom:1rem}.muted{color:var(--text-2)}small,.small{font-size:.82rem}.page{background:var(--bg);border:1px solid var(--border-soft);border-top:0}main.wrap{padding-block:1.1rem 2rem}.layout{display:grid;gap:1.6rem;grid-template-columns:minmax(0,1fr) 268px;align-items:start}@media(max-width:62rem){.layout{grid-template-columns:1fr}}.site-header{background:var(--surface);border-bottom:1px solid var(--border)}.hdr{display:flex;align-items:center;gap:1rem;padding-block:.6rem}.brand{display:flex;align-items:center;gap:.5rem;color:var(--text);font-weight:700;font-size:1.02rem;letter-spacing:-.02em}.brand:hover{text-decoration:none;color:var(--text)}.brand-mark{width:26px;height:26px;flex:0 0 auto}.brand em{font-style:normal;color:var(--ist)}.hdr-search{margin-left:auto;width:min(320px,42vw)}@media(max-width:52rem){.hdr-search{order:3;width:100%;margin-left:0}}.navbar{background:var(--accent)}@media(prefers-color-scheme:dark){:root:not([data-theme=light]) .navbar{background:var(--surface-3);border-bottom:1px solid var(--border)}}:root[data-theme=dark] .navbar{background:var(--surface-3);border-bottom:1px solid var(--border)}.navbar ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap}.navbar a{display:block;padding:.55rem .85rem;color:#fff;font-size:.88rem;font-weight:500}.navbar a:hover,.navbar a[aria-current=page]{background:#ffffff24;text-decoration:none;color:#fff}.nav-toggle{display:none}@media(max-width:52rem){.nav-toggle{display:block;margin-left:auto;background:none;border:1px solid var(--border);border-radius:var(--radius-sm);padding:.35rem .55rem;color:var(--text);cursor:pointer;font:inherit}.navbar ul{display:none;flex-direction:column}.navbar.open ul{display:flex}.navbar a{border-bottom:1px solid rgba(255,255,255,.12)}}.calc{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:1.2rem}.calc-hd{background:var(--surface-2);border-bottom:1px solid var(--border);padding:.55rem .9rem;font-weight:700;font-size:.95rem;border-radius:var(--radius) var(--radius) 0 0}.calc-bd{padding:.9rem}.field-row{display:grid;gap:.7rem;grid-template-columns:1fr auto 1fr;align-items:end}@media(max-width:46rem){.field-row{grid-template-columns:1fr}}.field{display:grid;gap:.25rem;min-width:0}.field>label,.field-label{font-size:.8rem;font-weight:600;color:var(--text-2)}.control,select.control,input.control{width:100%;min-height:44px;font:inherit;font-size:.95rem;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:.5rem .6rem}select.control{appearance:none;padding-right:1.9rem;background-image:linear-gradient(45deg,transparent 50%,currentColor 50%),linear-gradient(135deg,currentColor 50%,transparent 50%);background-position:calc(100% - 15px) 54%,calc(100% - 10px) 54%;background-size:5px 5px,5px 5px;background-repeat:no-repeat}.control:focus-visible{outline:2px solid var(--accent);outline-offset:-1px}.swap-btn{display:grid;place-items:center;width:40px;height:44px;margin-bottom:0;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-2);cursor:pointer;font-size:1rem}.swap-btn:hover{color:var(--accent);border-color:var(--accent)}@media(max-width:46rem){.swap-btn{width:100%;height:38px}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;font:inherit;font-size:.92rem;font-weight:600;cursor:pointer;min-height:44px;padding:.5rem 1.1rem;border-radius:var(--radius-sm);border:1px solid transparent}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover);color:#fff;text-decoration:none}.btn-secondary{background:var(--surface-2);color:var(--text);border-color:var(--border)}.btn-secondary:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}.btn-sm{min-height:34px;padding:.3rem .7rem;font-size:.84rem}.btn-row{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:.8rem}.result{border:1px solid var(--accent-line);background:var(--accent-soft);border-radius:var(--radius);padding:.9rem 1rem;margin-top:.9rem}.result-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:.6rem;align-items:center}@media(max-width:46rem){.result-grid{grid-template-columns:1fr;text-align:left}}.result-side{min-width:0}.result-time{font-size:clamp(1.6rem,1.1rem + 2.4vw,2.2rem);font-weight:700;letter-spacing:-.03em;line-height:1.05;font-variant-numeric:tabular-nums}.result-side.to .result-time{color:var(--ist)}.result-zone{font-size:.84rem;color:var(--text-2);display:flex;gap:.4rem;align-items:baseline;flex-wrap:wrap}.result-zone [data-abbr]{font-weight:700;color:var(--text)}.result-name{color:var(--text-3)}.result-name:empty{display:none}.result-date{font-size:.84rem;color:var(--text-2)}.result-offset{font-family:var(--mono);font-size:.76rem;color:var(--text-3)}.result-arrow{color:var(--text-3);font-size:1.2rem;text-align:center}.result-summary{margin:.7rem 0 0;padding-top:.7rem;border-top:1px solid var(--accent-line);font-size:.92rem;font-weight:600}.daynote{color:var(--text-3);font-size:.78rem;font-weight:400;margin-left:.3rem}.linklist{columns:2;column-gap:1.4rem;list-style:none;margin:0;padding:0;font-size:.9rem}.linklist.c3{columns:3}.linklist.c4{columns:4}.linklist li{break-inside:avoid;padding:.17rem 0}@media(max-width:46rem){.linklist,.linklist.c3,.linklist.c4{columns:2;font-size:.88rem}}@media(max-width:30rem){.linklist,.linklist.c3,.linklist.c4{columns:1}}.linkbar{display:flex;flex-wrap:wrap;gap:.3rem .5rem;font-size:.9rem;margin:0 0 .8rem;padding:0;list-style:none}.linkbar li:after{content:"·";margin-left:.5rem;color:var(--text-3)}.linkbar li:last-child:after{content:""}.cats{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}.cat{border:1px solid var(--border-soft);border-radius:var(--radius);background:var(--surface);padding:.8rem .9rem}.cat h3{margin:0 0 .45rem;font-size:.88rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-2)}.cat ul{list-style:none;margin:0;padding:0;display:grid;gap:.22rem;font-size:.9rem}.tbl-wrap,.table-scroll{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}table{border-collapse:collapse;width:100%;font-size:.9rem}caption{text-align:left;padding:.5rem .7rem;font-size:.82rem;color:var(--text-2)}th,td{text-align:left;padding:.42rem .7rem;border-bottom:1px solid var(--border-soft);white-space:nowrap}thead th{background:var(--surface-2);font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--text-2)}tbody tr:nth-child(2n){background:var(--bg-alt)}tbody tr:last-child td{border-bottom:0}tbody tr.hl{background:var(--ok-soft)}tbody tr.hl td:first-child{box-shadow:inset 3px 0 0 var(--ok)}td.num,th.num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:.86rem}.panel{border:1px solid var(--border-soft);border-radius:var(--radius);background:var(--surface);padding:.85rem .95rem}.panel+.panel{margin-top:.8rem}.panel h3{margin-top:0}.answer{border-left:3px solid var(--ist);background:var(--ist-soft);padding:.75rem .9rem;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:0 0 1rem}.answer p{margin:0}.note{font-size:.86rem;color:var(--text-2)}.kv{display:grid;grid-template-columns:auto 1fr;gap:.25rem .8rem;font-size:.88rem;margin:0}.kv dt{color:var(--text-2)}.kv dd{margin:0;font-weight:600}.sidebar{display:grid;gap:.9rem;position:sticky;top:.8rem}.side-box{border:1px solid var(--border-soft);border-radius:var(--radius);background:var(--surface)}.side-hd{background:var(--surface-2);border-bottom:1px solid var(--border-soft);padding:.45rem .75rem;font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text-2);border-radius:var(--radius) var(--radius) 0 0}.side-bd{padding:.6rem .75rem;font-size:.89rem}.side-bd ul{list-style:none;margin:0;padding:0;display:grid;gap:.25rem}.faq{display:grid;gap:.4rem}.faq details{border:1px solid var(--border-soft);border-radius:var(--radius-sm);background:var(--surface)}.faq summary{cursor:pointer;font-weight:600;font-size:.93rem;padding:.6rem .8rem;list-style:none;display:flex;justify-content:space-between;gap:.6rem}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";color:var(--text-3);font-weight:400}.faq details[open] summary:after{content:"−"}.faq details>p{margin:0;padding:0 .8rem .7rem;color:var(--text-2);font-size:.9rem}.crumbs{font-size:.82rem;color:var(--text-3);margin:0 0 .7rem}.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.35rem;margin:0;padding:0}.crumbs li:after{content:"›";margin-left:.35rem;color:var(--border)}.crumbs li:last-child:after{content:""}.site-footer{background:var(--surface);border-top:1px solid var(--border);margin-top:2rem;padding-block:1.4rem 1.6rem;font-size:.87rem}.foot-grid{display:grid;gap:1.2rem;grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}.foot-grid h4{font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;color:var(--text-2);margin:0 0 .45rem}.foot-grid ul{list-style:none;margin:0;padding:0;display:grid;gap:.22rem}.foot-bottom{margin-top:1.2rem;padding-top:.9rem;border-top:1px solid var(--border-soft);color:var(--text-3);font-size:.82rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}.badge{display:inline-flex;align-items:center;gap:.25rem;font-size:.72rem;font-weight:600;padding:.08rem .4rem;border-radius:3px;background:var(--surface-2);color:var(--text-2);border:1px solid var(--border-soft)}.badge.dst{background:var(--warn-soft);color:var(--warn);border-color:transparent}.badge.fixed{background:var(--ok-soft);color:var(--ok);border-color:transparent}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.cols-2{display:grid;gap:.9rem;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}.lsearch[data-astro-cid-ydoekhfu]{position:relative}.lsearch-field[data-astro-cid-ydoekhfu]{display:flex;align-items:center;gap:.5rem;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface);padding:0 .6rem}.lsearch-field[data-astro-cid-ydoekhfu]:focus-within{outline:2px solid var(--accent);outline-offset:1px}.lsearch-icon[data-astro-cid-ydoekhfu]{color:var(--text-faint);flex-shrink:0}.lsearch-input[data-astro-cid-ydoekhfu]{flex:1;min-width:0;font:inherit;font-size:.95rem;color:var(--text);background:none;border:0;padding:.55rem 0;min-height:2.4rem}.lsearch-input[data-astro-cid-ydoekhfu]:focus{outline:none}.lsearch-clear[data-astro-cid-ydoekhfu]{border:0;background:none;color:var(--text-faint);cursor:pointer;font-size:1.3rem;line-height:1;padding:0 .2rem}.lsearch-clear[data-astro-cid-ydoekhfu]:hover{color:var(--text)}.lsearch-list[data-astro-cid-ydoekhfu]{list-style:none}.lsearch-list[data-astro-cid-ydoekhfu]{position:absolute;z-index:30;left:0;right:0;top:calc(100% + 4px);list-style:none;margin:0;padding:.25rem;background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--radius-sm);box-shadow:var(--shadow);max-height:19rem;overflow-y:auto}.lsearch-list[data-astro-cid-ydoekhfu] li{display:flex;align-items:baseline;gap:.5rem;justify-content:space-between;padding:.45rem .6rem;border-radius:4px;cursor:pointer;font-size:.92rem}.lsearch-list[data-astro-cid-ydoekhfu] li[aria-selected=true]{background:var(--accent-soft)}.lsearch-list[data-astro-cid-ydoekhfu] .sub{color:var(--text-faint);font-size:.78rem;white-space:nowrap}.lsearch-empty[data-astro-cid-ydoekhfu]{font-size:.85rem;color:var(--text-muted);margin:.5rem 0 0}